It is used to determine the absolute heat of combustion of foods (calorific values). It may also used to find out relative values of heat of combustion of a series of foods by comparing the rise of temperature of a fixed volume of water when a constant mass of a substance is burnt completely.
Apparatus Comprises of two assemblies;
a) Calorimeter Unit b) Base Unit
The Calorimeter unit carries heat exchanger unit and base unit has crucible holder, ignition system etc. etc.
a) Calorimeter Unit
Comprises of a glass water jacket 150 x 80 mm (Ht x dia) surrounding a combustion chamber integral with it and open at its base. This combustion chamber is connected to a copper spiral heat transfer tube. The upper end of this tube passes through a hole in the lid on top and when in use is connected to a filter pump to draw the products of combustion through the copper spiral. A wire stirrer also passes through the cover and a hole with a bored rubber stopper is provided to accommodate a thermometer. Supplied complete with thermometer -5 to + 50°C x 0.10C (Mercury in glass)
b) Base Unit
Metal disc about 100 mm dia with a boss for mounting on 12mm retort rod (without rod). The unit works as the base of the combustion chamber and has inlet tubule 6 mm diameter for oxygen supply (oxygen supply is necessary to completely burn the food) and pair of pillars carrying low voltage igniter coil. Also having a moveable crucible support to enable the crucible to raise to the level of igniter coil from outside the assembled apparatus. Supplied without retort stand, crucible or spirit lamp.
Spare and Accessories
Spare borosilicate glass calorimeter jacket (150 x 80mm, L x Dia) P-2400/1
Spare igniter coil pack of 5 Pcs. P-2400/2
Nickel Crucible, one Pc. P-2400/3
Retort stand & base : Tripod 'A' base with rod P-2400/4
Spirit lamp for volatile samples P-2400/5
Low Voltage Supply Unit 12 V : Pl. see Power Supply Section. Oxygen Gas supply with regulator : To be obtained locally.
